[EnergyPlus_Support] [Fatal error] Calculation of PV performance

["FrancescoP" <direzionecontraria@xxxxxxxx>]

I have to model pv panels whose characteristics are here:
http://www.fotovolt.sk/pdf/tl_s_class_professional.pdf
see monocrystalline 240Wp

Since I think that model PhotovoltaicPerformance:Simple is too simplified I tried to model the pv performance with PhotovoltaicPerformance:EquivalentOne-Diode
Not all data are available in the technical sheet, therefore for some fields I used the default data. The values that in the technical sheet are in %/K in EnergyPlus are in V/K and in A/K.

PhotovoltaicPerformance:EquivalentOne-Diode,
    PerformancePVEquiv,      !- Name
    CrystallineSilicon,      !- Cell type
    60,                      !- Number of Cells in Series {dimensionless}
    1.46,                    !- Active Area {m2}
    0.95,                    !- Transmittance Absorptance Product {dimensionless}
    1.12,                    !- Semiconductor Bandgap {eV}
    1000000,                 !- Shunt Resistance {ohms}
    8.7,                     !- Short Circuit Current {A}
    36.53,                   !- Open Circuit Voltage {V}
    25,                      !- Reference Temperature {C}
    1000,                    !- Reference Insolation {W/m2}
    8.35,                    !- Module Current at Maximum Power {A}
    28.75,                   !- Module Voltage at Maximum Power {V}
    0.0026,                  !- Temperature Coefficient of Short Circuit Current {A/K}
    -.1006,                  !- Temperature Coefficient of Open Circuit Voltage {V/K}
    20,                      !- Nominal Operating Cell Temperature Test Ambient Temperature {C}
    46,                      !- Nominal Operating Cell Temperature Test Cell Temperature {C}
    800,                     !- Nominal Operating Cell Temperature Test Insolation {W/m2}
    30,                      !- Module Heat Loss Coefficient {W/m2-K}
    50000;                   !- Total Heat Capacity {J/m2-K}

I got the following error:

** Severe  ** EquivalentOneDiode Photovoltaic model failed to find maximum power point
   **   ~~~   ** Numerical solver failed trying to take exponential of too large a number
   **   ~~~   ** Check input data in PhotovoltaicPerformance:EquivalentOne-Diode
   **   ~~~   ** VV (voltage) = -20959.24767
   **   ~~~   ** II (current) = 0.00000
   **  Fatal  ** FUN: EnergyPlus terminates because of numerical problem in EquivalentOne-Diode PV model

Any advice, please?
Regards



------------------------------------

Primary EnergyPlus support is found at:
http://energyplus.helpserve.com or send a message to energyplus-support@xxxxxxxx

The primary EnergyPlus web site is found at:
http://www.energyplus.gov

The group web site is:
http://groups.yahoo.com/group/EnergyPlus_Support/

Attachments are currently allowed but be mindful that not everyone has a high speed connection.  Limit attachments to small files.

EnergyPlus Documentation is searchable.  Open EPlusMainMenu.pdf under the Documentation link and press the "search" button.
Yahoo! Groups Links

<*> To visit your group on the web, go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/

<*> Your email settings:
    Individual Email | Traditional

<*> To change settings online go to:
    http://groups.yahoo.com/group/EnergyPlus_Support/join
    (Yahoo! ID required)

<*> To change settings via email:
    EnergyPlus_Support-digest@xxxxxxxxxxxxxxx 
    EnergyPlus_Support-fullfeatured@xxxxxxxxxxxxxxx

<*> To unsubscribe from this group, send an email to:
    EnergyPlus_Support-unsubscribe@xxxxxxxxxxxxxxx

<*> Your use of Yahoo! Groups is subject to:
    http://docs.yahoo.com/info/terms/